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The Parkhead boss confirmed Record Sport 's exclusive revelation the club lodged a complaint to Sky Sports over comments made by pundit Kris Boyd following Wednesday's victory at Kilmarnock.

Griffiths hit his second goal in two games before aiming a "shush" gesture towards Boyd, who claimed last month the Scotland star had just four weeks left to save his Celtic career.

Boyd then went on the attack after the final whistle, insisting Griffiths - who has returned to scoring form following a battle with off-field problems - had struggled to meet the professional standards introduced during Brendan Rodgers' Celtic reign.

"I support the club and I think a little more discretion or tact could be used at times," said the Northern Irishman.

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"We want Leigh to flourish now and to be happy. He's got plenty of mental strength otherwise he wouldn't have been here at the club for so long.

"I don't think people these days give (what they are saying) much thought. We live in an age now where there's no accountability or responsibility at times, whether it's a mental health issue or another issue.

"It would be nice if they showed him a wee bit more compassion at times. At the end of the day he's a human being.

"Leigh's in a good place at the minute, he's enjoying his football and long may that continue.

"I've never been a critic of him. He's a natural goalscorer and that's the hardest thing in the game to do.

"If he has his critics - and we all have our critics - then the best thing to do is to go out, play well, score goals. You don't need to bite back. Just keep it in-house and be proud of yourself.

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"I don't think he's done anything wrong to warrant controversy at the minute or back-page headlines - other than his goals.

"Yeah he has a bit of fun with his celebrations at times here and there. I'd be the first one to get on top of him if there was an act of ill-discipline or something beyond the pale that was doing damage to the reputation to the club.

"But I don't see that at the minute and I think it's unfair."

Lennon confirmed Jeremie Frimpong will sit out Saturday's visit of Ross County as he continues to recover from Alan Power's tackle in midweek.